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Wyświetlanie pozycji 108-114 z 114

    • A Unique and Stable Polyproline I Helix Sorted out from Conformational Equilibrium by Solvent Polarity 

      Pollastrini, Matteo; Pasquinelli, Luca; Górecki, Marcin; Balzano, Federica; Cupellini, Lorenzo; Lipparini, Filippo; Barretta, Gloria Uccello; Marchetti, Fabio; Pescitelli, Gennaro; Angelici, Gaetano (American Chemical Society, 2022)
      Polyproline I helical structures are often considered as the hidden face of their most famous geminal sibling, Polyproline II, as PPI is generally spotted only within a conformational equilibrium. We designed and synthesized ...

    • Unlocking the reactivity of diazo compounds in red light with the use of photochemical tools 

      Orłowska, Katarzyna; Łuczak, Klaudia; Krajewski, Piotr; Santiago, João V.; Rybicka-Jasińska, Katarzyna; Gryko, Dorota (Royal Society of Chemistry, 2023)
      Structurally diversified diazoalkanes can be activated under red light irradiation relying on direct photolysis, photosensitization or photoredox catalysis.

    • Unprecedented 1,2-Aryl Shift Accompanying Double Alkyne Benzannulation 

      Sanil, Gana; Krzeszewski, Maciej; Chaładaj, Wojciech; Danikiewicz, Witold; Knysh, Iryna; Dobrzycki, Łukasz; Staszewska-Krajewska, Olga; Cyrański, Michał; Jacquemin, Denis; Gryko, Daniel T. (Wiley, 2023)
      The tandem intramolecular hydroarylation of alkynes accompanied by a 1,2-aryl shift is described. Harnessing the unique electron-rich character of 1,4-dihydropyrrolo[3,2-b]pyrrole scaffold, we demonstrate that the ...

    • UV Light Is No Longer Required for the Photoactivation of 1,3,4- Oxadiazolines 

      Orłowska, Katarzyna; Santiago, João V.; Krajewski, Piotr; Kisiel, Kacper; Deperasińska, Irena; Zawada, Katarzyna; Chaładaj, Wojciech; Gryko, Dorota (American Chemical Society, 2023)
      Carbenes play a key role in a plethora of organic transformations. Although stabilized diazo carbonyl compounds predominate as a source of electrophilic carbenes, the hazardous nature of nonstabilized analogues calls for ...

    • Vitamin B12 and a metal–organic framework enable the photocatalytic generation of alkyl radicals 

      Dworakowski, Krzysztof R.; Chołuj, Artur; Chmielewski, Michał J.; Gryko, Dorota (Royal Society of Chemistry, 2023)
      A versatile Co-catalyst-vitamin B12 (cobalamin)-can be photochemically reduced to its catalytically active Co(I) formunder visible light irradiation, in the presence of MIL-125-NH2(Ti) as a photocatalyst and utilized for ...

    • Vitamin B12: An efficient cobalt catalyst for sustainable generation of radical species 

      Giedyk, Maciej; Gryko, Dorota (Elsevier, 2022)
      Vitamins are organic molecules that are essential for the proper functioning of mammalian cells. Among them, there is only one organometallic molecule: vitamin B12, a natural cobalt complex that is involved in DNA synthesis ...

    • Wheat germ lipase: isolation, purification and applications 

      Kublicki, Marcin; Koszelewski, Dominik; Brodzka, Anna; Ostaszewski, Ryszard (Taylor and Francis, 2022)
      In recent years, wheat germ lipase (WGL) is attracting considerable interest. To date, several WGL applications have already been described: (i) fats and oils modification; (ii) esterification reactions in organic media, ...